"In Gun Trouble at Diamondback, Bear is given the nasty assignment of going after the man or men who killed his old friend, Lou Cameron. Cameron was the town marshal of Diamondback, a small, dusty settlement in the wilds of Wyoming Territory--until someone backshot him when he was leaving the outhouse behind his office. When Bear rides into Diamondback, he finds himself not only chin-deep in the mystery of who killed his old friend but eyebrow deep in the allure of his old friend's still-beautiful and alluring widow. In The Jackals of Sundown, Henry Dade assigns his top deputy, Haskell, to head down to Texas and throw the cuffs on an infamous and notoriously mysterious as well as slippery regulator named Jack Hyde, whose cunning and devious methods of killing those he's been paid to kill, as well as his uncanny ability to avoid capture, have gotten him dubbed "the Jackal." Complicating matters is that nobody seems to know what the Jackal looks like. No one has gotten that close and lived to tell about him. He rides like a ... well, like a jackal haunting the range!"-- Provided by publisher.